Johannes Sixt <j.s...@viscovery.net> writes:
> It might be worth it. We already have a similar special case in
> write_or_die.c:maybe_flush_or_die() for Windows, although it is not about
> a colon in a path name.
>
> Perhaps like this.

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Hrm, the "we already have" one b2f5e26 (Windows: Work around an
oddity when a pipe with no reader is written to., 2007-08-17) was
what you added while I was looking the other way ;-) as a part of
Windows specific pull.
That change, and this patch, seem to cover the cases to be ignored
with a bit too wide a net to my taste. On other systems, and even
on Windows if the path does not have any colon, EINVAL is something
we would want to notice and report, as a potential problem, no?
> --- 8< ---
> From: Johannes Sixt <j...@kdbg.org>
> Subject: [PATCH] attr: do not warn on path with colon on Windows
>
> In the same spirit as commit 8e950dab (attr: failure to open a
> .gitattributes file is OK with ENOTDIR), ignore EINVAL errors. On
> Windows, a path that contains a colon that is not the one after the
> drive letter is not allowed and is reported with errno set to
> EINVAL.
>
> Signed-off-by: Johannes Sixt <j...@kdbg.org>
> ---
> attr.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/attr.c b/attr.c
> index 8010429..ac945ad 100644
> --- a/attr.c
> +++ b/attr.c
> @@ -354,7 +354,15 @@ static struct attr_stack *read_attr_from_file(const char
> *path, int macro_ok)
> int lineno = 0;
>
> if (!fp) {
> - if (errno != ENOENT && errno != ENOTDIR)
> + /*
> + * If path does not exist, it is not worth mentioning,
> + * but I/O errors and permission errors are.
> + *
> + * On Windows, EINVAL is reported if path contains a colon
> + * that is not the driver letter separator. Such a path
> + * cannot exist in the file system and is also uninteresting.
> + */
> + if (errno != ENOENT && errno != ENOTDIR && errno != EINVAL)
> warn_on_inaccessible(path);
> return NULL;
> }
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